265253221 has 2 divisors, whose sum is σ = 265253222. Its totient is φ = 265253220.

The previous prime is 265253213. The next prime is 265253249. The reversal of 265253221 is 122352562.

It is an a-pointer prime, because the next prime (265253249) can be obtained adding 265253221 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264225025 + 1028196 = 16255^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 265253221 - 2³ = 265253213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 265253221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265253251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132626610 + 132626611.

It is an arithmetic number, because the mean of its divisors is an integer number (132626611).

Almost surely, 2^265253221 is an apocalyptic number.

It is an amenable number.

265253221 is a deficient number, since it is larger than the sum of its proper divisors (1).

265253221 is an equidigital number, since it uses as much as digits as its factorization.

265253221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 265253221 is about 16286.5963601975. The cubic root of 265253221 is about 642.5203522246.

The spelling of 265253221 in words is "two hundred sixty-five million, two hundred fifty-three thousand, two hundred twenty-one".